CardKB v1.1 is a card-size '50 key' QWERTY keyboard. Adpots ATMega8A as the MCU, communication port I2C, and one 'RGB-LED' indicator. Full-function keyboard, multi-key combination. GROVE interface, support UIFlow and for . Two compatible holes. Applications: Keyboard peripherals for Core. Color: White Material: Plastic The printing/appearance from batch to batch, but it not affect the use; the actual product may have color difference due to different light or display. Package Contents: 1x Matrix Keyboard 1x GROVE Cable (color is random, No specification accepted) Only the above package content, other products are not included. Note: Light reflection and different displays may cause the color of the item in the picture a little different from the real thing. The measurement allowed error is +/- 1-3cm.